I’m sure you will do better in the test because you so hard this year．
A. studied
B. had studied
C. will study
D. have been studying
网友回答
A. studied
B. had studied
C. will study
(答案→)D. have been studying
解析：考查时态，句意：我确信你将在考试中做的更好，因为你今年一直在学习很努力。根据语境学习的动作是从过去一直持续到现在，还要持续下去。所以用现在完成进行时。选D。